If anyone wants to buy a slightly used gown, I think it is size 49, which would be good for someone about 5'6" to 5'8". My roommate bought it new two years ago, she transfered and left it to me. L60. My email is kb228@st-andrews.ac.uk
I had a friend who lived in A26 (right below you and pretty much the same size), it was pretty small, bearable if you have a good roommate torture if you don't.